*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{background:radial-gradient(circle at 20% 80%,#1a1a2e 0,#16213e 25%,#0f3460 50%,#1a1a2e 75%,#533483 100%);min-height:100vh;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:#fff;position:relative}body:before{top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 25% 25%,rgba(255,215,0,.1) 0,transparent 50%),radial-gradient(circle at 75% 75%,rgba(255,0,128,.1) 0,transparent 50%),radial-gradient(circle at 50% 10%,rgba(0,255,255,.1) 0,transparent 50%);z-index:0}body:after,body:before{content:"";position:fixed;pointer-events:none}body:after{inset:0;background:repeating-radial-gradient(circle at 30% 30%,hsla(0,0%,100%,.08) 0,hsla(0,0%,100%,.08) 2px,transparent 3px,transparent 13px);opacity:.18}@keyframes aurora{0%{transform:translateX(-100%) rotate(0deg)}50%{transform:translateX(100%) rotate(180deg)}to{transform:translateX(-100%) rotate(1turn)}}.aurora{position:fixed;top:0;left:0;width:200%;height:100%;background:linear-gradient(45deg,rgba(255,0,150,.1),rgba(0,204,255,.1),rgba(255,255,0,.1),rgba(255,0,150,.1));animation:aurora 20s linear infinite;z-index:0}.aurora,.snowflake{pointer-events:none}.snowflake{position:absolute;top:-2rem;color:hsla(0,0%,100%,.95);text-shadow:0 0 12px hsla(0,0%,100%,.8);-webkit-user-select:none;-moz-user-select:none;user-select:none;z-index:2;animation-name:fall,drift;animation-duration:12s,6s;animation-timing-function:linear,ease-in-out;animation-iteration-count:infinite,infinite;animation-fill-mode:both;will-change:transform,opacity}@keyframes fall{0%{transform:translateY(0);opacity:0}10%{opacity:1}to{transform:translateY(110vh);opacity:0}}@keyframes drift{0%,to{transform:translateX(0)}50%{transform:translateX(20px)}}@keyframes floatTree{0%,to{transform:translateY(0) rotate(0deg)}33%{transform:translateY(-15px) rotate(2deg)}66%{transform:translateY(-8px) rotate(-1deg)}}.christmas-tree{position:fixed;bottom:20px;left:20px;width:120px;height:120px;z-index:5;animation:floatTree 6s ease-in-out infinite;filter:drop-shadow(0 0 20px rgba(0,255,0,.3))}.tree-trunk{bottom:0;width:12px;height:30px;background:#8b4513;border-radius:6px 6px 2px 2px}.tree-layers,.tree-trunk{position:absolute;left:50%;transform:translateX(-50%)}.tree-layers{bottom:25px}.tree-layer{width:0;height:0;border-left:25px solid transparent;border-right:25px solid transparent;border-bottom:35px solid #228b22;position:absolute;left:-25px}.tree-layer:first-child{bottom:0}.tree-layer:nth-child(2){bottom:20px;border-bottom-width:30px}.tree-layer:nth-child(3){bottom:35px;border-bottom-width:25px}.tree-ornaments{position:absolute;width:6px;height:6px;border-radius:50%;background:radial-gradient(circle,gold,tomato);box-shadow:0 0 8px rgba(255,215,0,.8)}.tree-ornaments:first-child{top:15px;left:20px}.tree-ornaments:nth-child(2){top:35px;right:15px}.tree-ornaments:nth-child(3){top:55px;left:25px}.tree-star{position:absolute;top:-8px;left:50%;transform:translateX(-50%);color:gold;font-size:16px;text-shadow:0 0 10px rgba(255,215,0,.8);animation:twinkle 2s ease-in-out infinite}@keyframes floatGift{0%,to{transform:translateY(0) rotate(0deg)}25%{transform:translateY(-10px) rotate(5deg)}50%{transform:translateY(-5px) rotate(-3deg)}75%{transform:translateY(-15px) rotate(2deg)}}.floating-gift{position:fixed;width:40px;height:40px;background:linear-gradient(135deg,#ff6b6b,gold);border-radius:8px;z-index:3;animation:floatGift 8s ease-in-out infinite;box-shadow:0 4px 15px hsla(0,100%,71%,.3);border:2px solid hsla(0,0%,100%,.3)}.floating-gift:before{content:"🎁";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px}.floating-gift:first-child{top:15%;right:10%;animation-delay:0s}.floating-gift:nth-child(2){top:60%;left:8%;animation-delay:2s}.floating-gift:nth-child(3){top:35%;right:15%;animation-delay:4s}main{display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;z-index:2}.glass-container,main{padding:2rem;position:relative}.glass-container{background:hsla(0,0%,100%,.05);backdrop-filter:blur(15px);-webkit-backdrop-filter:blur(15px);border:1px solid hsla(0,0%,100%,.2);border-radius:10px;box-shadow:0 8px 32px 0 rgba(31,38,135,.37);max-width:600px;width:100%;text-align:center}.glass-container:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(135deg,hsla(0,0%,100%,.1),hsla(0,0%,100%,.05));border-radius:20px;z-index:-1}h1{font-size:2.4rem;margin-bottom:2rem;text-shadow:0 2px 10px rgba(0,0,0,.3);animation:float 3s ease-in-out infinite;background:linear-gradient(135deg,#ff6b6b,#4ecdc4,#45b7d1,#96ceb4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-20px)}}h2{font-size:4rem;font-weight:700;margin:2rem 0;background:linear-gradient(135deg,#ff6b6b,#4ecdc4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-shadow:0 2px 10px rgba(0,0,0,.3)}.countdown-box{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));grid-gap:1rem;gap:1rem;margin:2rem 0}.countdown-item{background:hsla(0,0%,100%,.1);border:1px solid hsla(0,0%,100%,.3);border-radius:15px;padding:1.5rem;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);position:relative;overflow:hidden}.countdown-item:before{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.2),transparent);transition:left .5s}.countdown-item:hover:before{left:100%}.countdown-item:hover{background:hsla(0,0%,100%,.15);transform:translateY(-5px) scale(1.05);box-shadow:0 8px 25px hsla(0,100%,70%,.3);border-color:hsla(0,100%,70%,.5);filter:brightness(1.1)}.countdown-item:active{transform:translateY(-2px) scale(.98);transition:transform .1s ease}.countdown-number{font-size:2.5rem;font-weight:700;color:#fff;display:block;transition:all .3s ease}.countdown-item:hover .countdown-number{color:gold;text-shadow:0 0 20px rgba(255,215,0,.8);transform:scale(1.1)}p{font-size:1.2rem;margin-top:1.5rem;color:#cbd5e0;line-height:1.6}select{background:hsla(0,0%,100%,.1);color:#fff;border:2px solid hsla(0,0%,100%,.3);padding:.8rem 1.2rem;border-radius:10px;font-size:1rem;cursor:pointer;transition:all .3s ease;margin-bottom:2rem}select:hover{background:hsla(0,0%,100%,.15);border-color:hsla(0,100%,70%,.5)}select:focus{outline:none;background:hsla(0,0%,100%,.2);border-color:#ff6b6b;box-shadow:0 0 10px hsla(0,100%,70%,.3)}select option{background:#1a1a2e;color:#fff}footer{position:fixed;bottom:0;width:100%;background:rgba(0,0,0,.3);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:1rem 0;text-align:center;z-index:1}.footer-content{font-size:.9rem;color:#a0aec0}.footer-links{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap;margin-top:.5rem}.footer-links a{color:#4ecdc4;text-decoration:none;transition:color .3s ease}.footer-links a:hover{color:#ff6b6b}@media (max-width:768px){.glass-container{padding:2rem}h1{font-size:2rem}h2{font-size:2.5rem}.countdown-box{grid-template-columns:repeat(2,1fr)}.countdown-item{padding:1rem}.countdown-number{font-size:1.8rem}footer{position:relative;margin-top:3rem}}